Search found 39 matches
- Tue Nov 28, 2023 12:24 pm
- Forum: solidification
- Topic: Grain size versus cooling rate ?
- Replies: 6
- Views: 95402
Re: Grain size versus cooling rate ?
Hi Stéphane, You may perhaps find some answers in my presentation ‘Phase-Field Studies of the Interplay between Nucleation and Growth in Light Metal Alloys’ from March 2019 which you can find in ResearchGate https://www.researchgate.net/publication/332409294_Phase-Field_Studies_of_the_Interplay_betw...
- Fri Nov 04, 2022 10:07 pm
- Forum: solid-solid phase transformations
- Topic: Pearlite-to-austenite transformation
- Replies: 1
- Views: 4649
Re: Pearlite-to-austenite transformation
Dear Pina, great to see you working on such interesting simulations! I couldn't run your simulation without the input structure, but I guess the critical point is that you defined austenite with tetragonal symmetry. This means, it can nucleate in two different variants with special orientation relat...
- Thu Oct 06, 2022 3:07 pm
- Forum: solid-solid phase transformations
- Topic: nucleation density
- Replies: 2
- Views: 6297
Re: nucleation density
Hi, as far as I understood you would like to evaluate the effective nucleation density from a simulation which has already been run, i.e. as post processing. In fact, there does not yet exist a direct output for the effective nucleation density, but in most cases you can evalutate it indirectly from...
- Tue Aug 23, 2022 6:48 pm
- Forum: post-processing
- Topic: Changing orientation files to inverse pole figures
- Replies: 4
- Views: 13043
Re: Changing orientation files to inverse pole figures
Hi Moritz, I guess the most convenient way would be to combine the output files *.korn and *TabO. 1.) Extract the grain id for each cell within the domain from file.korn. 2.) Get the associated orientation from TabO. 3.) Create the pole figure with MatLab or the same tool you use for experimental da...
- Mon Feb 07, 2022 4:35 pm
- Forum: solidification
- Topic: Curvature output (.Krum)
- Replies: 1
- Views: 4676
Re: Curvature output (.Krum)
Hi, In fact, two different ways of curvature evaluation are inplemented within Micress. A general advantage of the phase-field method is that the kinetic phase-field equation ( derived from the free energy functional) implicitely accounts for capillarity forces and profile readjustment. The numerica...
- Wed Apr 14, 2021 7:20 pm
- Forum: phase-field model
- Topic: Multiphase field equation problem
- Replies: 2
- Views: 6584
Re: Multiphase field equation problem
Hi, To question1: Relaxation approach The MPF order parameters are linked by the unit sum constraint, i.e. each phase can only change its state in interaction with another phase. The given relaxation approach describes the evolution of the multiphase system towards a minimum of the free energy under...
- Fri Dec 11, 2020 5:10 pm
- Forum: solidification
- Topic: Exactly same results from separate calculations
- Replies: 1
- Views: 2230
Re: Exactly same results from separate calculations
The amount of noise you specified in input file is locally added to the driving force. You can monitor the effect on the driving force in the *.driv output file. The values are given in units of J/cm3, if you devide them by the local entropy of fusion ( dSf ≈ 1 J/(cm3 K) you will get the extra under...
- Thu Feb 27, 2020 4:09 pm
- Forum: solid-solid phase transformations
- Topic: Benchmark 2D single grain growth with square law
- Replies: 2
- Views: 3820
Re: Benchmark 2D single grain growth with square law
Hi Billy, first I like to comment that the shrinkage of a single round grain is one of the fundamental benchmarks provided in the Micress/example/benchmark folder under the name 'B007_1Grain_Shrinking_dri'. If you do not yet have this folder, you can download it from the Micress webpage https://micr...
- Thu Jul 18, 2019 5:42 pm
- Forum: solidification
- Topic: Grain Input
- Replies: 9
- Views: 14748
Re: Grain Input
Good question! We still have to change it. When we first implemented random grain positioning, the critical radius did not yet exist. Later, when we introduced the critical radius, we couldn't agree how to define it in this case and postponed the problem. At present, the critical radius is still sim...
- Wed Jan 23, 2019 9:16 pm
- Forum: phase-field model
- Topic: general Phase field equation for multi-obstacle potential
- Replies: 4
- Views: 9346
Re: general Phase field equation for multi-obstacle potential
1.) In this formulation, the mobility M_{\alpha \beta }^{\phi } denotes the physical mobility of an interface between two phases alpha and beta. We have writen the PF equation in a way that the parameters can easily be identified by matching to the Gibbs-Thomson equation. In the case of uncoupled gr...